You can’t carry forward gains, but you can carry
back losses.
In TurboTax CD/Download EasyStep mode or TurboTax
Online, click on the Find icon, then search for “Loss”. Click on “Losses” and
click “Go”. Check the box next to “Request For Loss Carryback”, then click
“Continue” until you get to the Carryback page that you need.
In TurboTax CD/Download Forms mode, click on the
Forms icon, then search for “Loss”. Click on “Loss Worksheet” and click “OK”.